Modified Starches Used as Additives in Enhanced Oil Recovery (EOR)

López, Olivia V.; Castillo, Luciana Andrea; Ninago, Mario Daniel; Ciolino, Andrés Eduardo; Villar, Marcelo A.

doi:10.1007/978-3-319-61288-1_9

Cited by 7 publications

(6 citation statements)

References 65 publications

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“…The variable κ is the permeability and p/L is the pressure drop over the distance L. The proportionality constant K = κ/µ is called hydraulic conductivity and can be derived from Stokes' equation assuming a linear relation between the viscous forces and the flow velocity [10]. While Darcy's law is a sound description for the bulk behavior of a fluid whose viscosity µ is constant, many relevant fluids in e.g., in food [11][12][13] and petroleum [14,15] industry, show a much more complex constitutive law. For most of these socalled non-Newtonian fluids, the viscosity can be described by a nonlinear function of the stress-strain rate tensor E or more specifically its first principal invariantγ = 1 2 √ E : E [16].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Effective Viscosity of Non-newtonian Fluids Flowing Through Porous Media

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Determination of the Effective Viscosity of Non-newtonian Fluids Flowing Through Porous Media

et al. 2019

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“…Polymer flooding is a common technique used for injecting polymer solution into reservoir formations, and has proved to be successful in other parts of the world [3] ). The polymer functions as a mobility control agent during the polymer flooding process and provides better displacement and sweep efficiencies [9] (Al-Hajri et al, 2018).…”

Section: Polymer Floodingmentioning

confidence: 99%

“…HPAM has a synthetic nature which makes it harmful to the environment [8] (Agi, 2017). Furthermore, HPAM channeling can take place in high permeability zone leading to premature polymer loss from the wellbore, as a result affect oil phase displacement [3] (Lopez et al, 2017). The biopolymer xanthan has the problem of degradation, and both are very expensive.…”

Section: Statement Of Problemmentioning

confidence: 99%

Improving Oil Recovery Efficiency in Niger Delta Reservoirs Using Corn Starch as a Local Polymer

Eseimokumoh¹

2021

ijcsrr

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Polymer flooding is a chemical enhanced oil recovery method that improves the recovery of oil by controlling the mobility of water to oil phase. It uses polymer solutions to increase the viscosity of the displacing water thereby decreasing water/oil mobility ratio (Speight, 2013). The volumetric and displacement sweep efficiencies are positively affected by polymer flooding. The viscosity of the aqueous phase is increased due to the molecular size and structure of the polymer used. The main objective of this research was to study the ability of cornstarch (local polymer) to recover additional oil after conventional water flooding. The objective was successfully achieved by injecting four different unconsolidated samples (sand pack) with cornstarch solution at varying concentration of 500ppm, 1000ppm, 3000ppm, and 9000ppm. From the results of the experiment conducted, it was deduced that Cornstarch has the ability to recover an additional volume of oil about half the volume of oil recovered during conventional water flooding (i.e. if 50% of oil initially in place was recovered during water flooding, cornstarch can recover an additional 25% of the residual oil after water flooding). Also, higher concentrations of cornstarch reduce the recovery factor due to polymer adsorption on the rock surfaces which alters the rock wettability. To reduce the adsorption effect of Cornstarch, it is recommended that the concentration of Cornstarch be measured after the flooding experiments for a better understanding of the adsorption mechanism of cornstarch.

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“…Starch is an abundantly available semi-crystalline carbohydrate polysaccharide which has been used in oil and gas drilling for decades. Oil field applications of starch and its derivatives include fluid loss control, mud rheology improvement, shale stabilization, drag reduction, water shut-off, and oil recovery improvement [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Bentonite-Free Water Based Mud Reinforced with Carboxymethylated Tapioca Starch: Rheological Modeling and Optimization Using Response Surface Methodology (RSM)

2021

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Drilling mud’s rheological characteristics, such as plastic viscosity and yield point, are adversely affected with an inappropriate mud formulation. Native starch is one of the most important components in water-based mud because it improves the rheological and filtration characteristics of the mud. The native starch stability under various temperature and exposure time regimes is an important concern for utilizing starch in oil and gas drilling operations. In this work, tapioca starch was modified using carboxymethylation for the first time in order to improve its performance in non-damaging water-based muds. The modified starch was characterized by Fourier-transform infrared spectroscopy and X-ray diffraction. The thermal stability was tested using thermal gravimetric analysis. Various mud blends were formulated based on the experimental design using response surface methodology (RSM) to investigate their performance at various temperature conditions. Thirty experimental runs were carried out based on the selected factors and responses considering the optimal (custom) design, and the results were analyzed through ANOVA. The Fourier-transform infrared spectroscopy and X-ray diffraction results confirmed the carboxymethylation of starch. The TGA analysis revealed strong thermal stability after modification. Additionally, the Power law model (PLM) described the obtained rheological data for the selected formulations, resulting in determination coefficients of more than 0.95. Furthermore, the examined samples showed a reduction in the flow behavior index from 0.30 to 0.21 and an increase in the consistency index from 5.6 to 15.1. Optimization and confirmation results revealed the adequacy of the generated empirical models for both plastic viscosity and yield point. The obtained consistency index values provided a direct relationship with the modified starch concentration, indicating an improvement in the cutting carrying capacity of mud. Based on the current literature survey, the studied formulation has not been reported in the literature.

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Modified Starches Used as Additives in Enhanced Oil Recovery (EOR)

Cited by 7 publications

References 65 publications

Determination of the Effective Viscosity of Non-newtonian Fluids Flowing Through Porous Media

Determination of the Effective Viscosity of Non-newtonian Fluids Flowing Through Porous Media

Improving Oil Recovery Efficiency in Niger Delta Reservoirs Using Corn Starch as a Local Polymer

Experimental Study of Bentonite-Free Water Based Mud Reinforced with Carboxymethylated Tapioca Starch: Rheological Modeling and Optimization Using Response Surface Methodology (RSM)

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